Overlayfs whiteout can be visible if underlying upper fs does not support d_type. Kernel commit 45aebea (ovl: Ensure upper filesystem supports d_type) prevents mounting overlayfs like this since v4.6-rc1. Check upper fs before mounting overlay, mark as not run if needs. Signed-off-by: Xiong Zhou <xzhou@xxxxxxxxxx> --- v2: use case to make this less ugly.. common/rc | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/common/rc b/common/rc index 8bec836..946b354 100644 --- a/common/rc +++ b/common/rc @@ -273,6 +273,22 @@ _overlay_mount() local dir=$1 local mnt=$2 shift 2 + + local upper_fst=$(df --output=fstype $dir | tail -1) + case "$upper_fst" in + xfs) + if ! xfs_info $dir | grep -q "ftype=1" ; then + _notrun "upper fs needs to support d_type" + fi + ;; + ext2|ext3|ext4) + if ! tune2fs -l $(df --output=source $dir | tail -1) | \ + grep -q filetype ; then + _notrun "upper fs needs to support d_type" + fi + ;; + esac + mkdir -p $dir/$OVERLAY_UPPER_DIR mkdir -p $dir/$OVERLAY_LOWER_DIR mkdir -p $dir/$OVERLAY_WORK_DIR -- 2.5.5 -- To unsubscribe from this list: send the line "unsubscribe fstests" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
